Same hull for sure but there are some differences on the gunnel width and support structure of the hull. In 2003 they went to smaller gunnels and more support in the middle of the boat so it changed the internal configuration of the boat to give it a little more room but it also made the 210 handle a little worse in choppy water. If you are worried about differences in the wake then there really isn't any because the hull is same. I would llook at which motor is in there as well because the 2002 should have the GT-40 which is a great engine and I think the 2005 will have a different engine (not sure which one). Also in 2003 CC seemed to step up the bling factory especially on the Team addition so it likely has some better features as well. You are probably looking at some differences in the PP version too and maybe the hydrogate if that was available in 2005.

I good place to gather info on the differences in 210 SANs is to look at planet nautique and you can search till your heart is made up.

There no difference in space on the interior of teh boat for late model 2002s. In early 02, they had teh back seat that lifted up. There were not many of those made. The interior is exactly the same, minus electronic latches for the left and right rear trunks and velcro vs. a hinge on the side seat. UJ

In 2002 the gunnels were narrowed, the floor sunk a few inches and the sloped transom was discontinued, so both those models should have extremely similar interiors. The hydrogate wasn't ever an option on previous generation 210's. The 05 may have the Excalibur while the 02 will probably have a GT40 or might have the GM Apex. No issues either way. If you're looking to justify $10K difference, you'll have to look at overall condition, engine hours, and overall perception at how both boats were kept. I'd look at the trailers, too.